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    <h1 class="topictitle1">empty_task Class</h1>

    
<div><div class="section"><h2 class="sectiontitle">Summary</h2>
        <p>Subclass of <em>task</em> that represents doing nothing.</p>

        </div>
<div class="section"><h2 class="sectiontitle">Syntax</h2>
        <pre>class empty_task;</pre>
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<div class="section"><h2 class="sectiontitle">Header</h2>
        <pre>#include "tbb/task.h"</pre>
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<div class="section"><h2 class="sectiontitle">Description</h2>
        <p>An <samp class="codeph">empty_task</samp> is a task that does nothing. It is useful as a continuation of a parent task when the continuation should do nothing except wait for its predecessors to complete.</p>

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<div class="section"><h2 class="sectiontitle">Members</h2>
<pre> namespace tbb {
    &nbsp;&nbsp;&nbsp; class empty_task: public task {
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /*override*/ task* execute() {return NULL;}
    &nbsp;&nbsp;&nbsp; };&nbsp; 
 } </pre></div>

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<div class="parentlink"><strong>Parent topic:</strong>&nbsp;<a href="../../reference/task_scheduler.htm">Task Scheduler</a></div>
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